WO2018097084A1 - Pneumatique - Google Patents

Pneumatique Download PDF

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Publication number
WO2018097084A1
WO2018097084A1 PCT/JP2017/041607 JP2017041607W WO2018097084A1 WO 2018097084 A1 WO2018097084 A1 WO 2018097084A1 JP 2017041607 W JP2017041607 W JP 2017041607W WO 2018097084 A1 WO2018097084 A1 WO 2018097084A1
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WO
WIPO (PCT)
Prior art keywords
layer
tire
cord
rubber
auxiliary belt
Prior art date
Application number
PCT/JP2017/041607
Other languages
English (en)
Japanese (ja)
Inventor
紗生 太田
Original Assignee
株式会社ブリヂストン
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社ブリヂストン filed Critical 株式会社ブリヂストン
Priority to CN201780072532.8A priority Critical patent/CN109982866B/zh
Priority to US16/464,159 priority patent/US20200317000A1/en
Priority to EP17873668.2A priority patent/EP3546246B1/fr
Publication of WO2018097084A1 publication Critical patent/WO2018097084A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
    • B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
    • B60C9/20—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
    • B60C9/2003—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel characterised by the materials of the belt cords
    • B60C9/2009—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel characterised by the materials of the belt cords comprising plies of different materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
    • B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
    • B60C9/26—Folded plies
    • B60C9/263—Folded plies further characterised by an endless zigzag configuration in at least one belt ply, i.e. no cut edge being present
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
    • B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
    • B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
    • B60C9/20—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
    • B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
    • B60C9/28—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers characterised by the belt or breaker dimensions or curvature relative to carcass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
    • B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
    • B60C9/20—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
    • B60C2009/2061—Physical properties or dimensions of the belt coating rubber
    • B60C2009/2064—Modulus; Hardness; Loss modulus or "tangens delta"
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
    • B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
    • B60C9/20—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
    • B60C9/22—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel the plies being arranged with all cords disposed along the circumference of the tyre
    • B60C2009/2238—Physical properties or dimensions of the ply coating rubber
    • B60C2009/2242—Modulus; Hardness; Loss modulus or "tangens delta"
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
    • B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
    • B60C9/26—Folded plies
    • B60C9/263—Folded plies further characterised by an endless zigzag configuration in at least one belt ply, i.e. no cut edge being present
    • B60C2009/266—Folded plies further characterised by an endless zigzag configuration in at least one belt ply, i.e. no cut edge being present combined with non folded cut-belt plies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C2200/00—Tyres specially adapted for particular applications
    • B60C2200/04—Tyres specially adapted for particular applications for road vehicles, e.g. passenger cars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
    • B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
    • B60C9/20—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
    • B60C9/2003—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel characterised by the materials of the belt cords
    • B60C9/2006—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel characterised by the materials of the belt cords consisting of steel cord plies only
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
    • B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
    • B60C9/20—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
    • B60C9/22—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel the plies being arranged with all cords disposed along the circumference of the tyre
    • B60C9/2204—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel the plies being arranged with all cords disposed along the circumference of the tyre obtained by circumferentially narrow strip winding

Definitions

  • the present invention relates to a tire, and more specifically, a spiral cord layer in which a reinforcing cord is spirally wound around a crown portion to form an upper layer and a lower layer, and an auxiliary belt layer disposed on the outer side in the tire radial direction. It relates to the improvement of the provided tire.
  • tire reinforcing members For example, as a belt structure as a reinforcing member of a tire for a passenger car, two or more belt crossing layers in which the cord directions of the reinforcing cords cross each other are arranged on the outer side in the radial direction of the crown portion of the carcass as a tire skeleton member.
  • the installed structure is common.
  • the upper and lower belt layers are arranged so that the reinforcing cords cross each other, and the reinforcing cords are folded back at the belt layer end portion and extend from one to the other belt layer.
  • a form having a spiral winding structure is also known.
  • Patent Document 1 discloses an annular core belt formed by winding a reinforcement cord at an angle of substantially 0 degrees with respect to the tire circumferential direction on the outer peripheral side of the carcass layer in the tread portion.
  • a pneumatic radial tire in which a belt structure composed of a layer and a covering belt layer formed by spirally winding a reinforcing cord around the layer is disposed. It is also disclosed that a belt protective layer is provided.
  • Patent Document 1 it is known to arrange a spiral cord layer substantially consisting of two layers of an upper layer and a lower layer by spirally winding a reinforcing cord on the outer peripheral side of the carcass layer. ing.
  • a spiral cord layer has different behavior from a normal cross belt layer consisting of two independent layers of belts during running because the upper and lower reinforcement cords are continuous with each other. Will be shown.
  • the auxiliary belt layer is disposed on the outer peripheral side of the spiral cord layer, the occurrence of distortion between the spiral cord layer and the auxiliary belt layer becomes a problem.
  • the auxiliary belt layer is provided on the crossing belt layer, since the entire crossing belt layer is not displaced, the generation of strain between the layers does not cause a problem. It can be said that this is a problem peculiar to the case where the spiral cord layer is arranged instead.
  • an object of the present invention is to provide a technique for suppressing the occurrence of separation from the layer between the spiral cord layer and the auxiliary belt layer in a tire including a spiral cord layer and an auxiliary belt layer.
  • the tire of the present invention is arranged between the pair of bead portions in a toroidal shape, and is disposed on the outer side of the crown portion of the carcass in the radial direction of the tire, and a reinforcing cord is wound spirally to form an upper layer and a lower layer.
  • a tire comprising: a formed spiral cord layer; and an auxiliary belt layer disposed on the outer side in the tire radial direction of the spiral cord layer, At least the auxiliary belt of rubber interposed between the helical cord layer and the auxiliary belt layer at least at the end in the tire width direction in the region where the helical cord layer and the auxiliary belt layer are laminated.
  • the rubber other than the coating rubber of the layer has a 100% modulus lower than the 100% modulus of the coating rubber of the auxiliary belt layer.
  • an interlayer rubber is provided between the spiral cord layer and the auxiliary belt layer, and the 100% modulus of the interlayer rubber is 20 to 95 of the 100% modulus of the coating rubber of the auxiliary belt layer. % Is preferable.
  • the tire of this invention is equipped with a core material cord layer between the upper layer and the lower layer of the spiral cord layer.
  • the angle of the reinforcing cord of the spiral cord layer is preferably in the range of 12 ° to 90 ° with respect to the tire circumferential direction.
  • the occurrence of a failure caused by the spiral cord layer can be suppressed by suppressing the occurrence of separation from the interlayer between the spiral cord layer and the auxiliary belt layer. It has become possible to realize tires with reduced generation.
  • FIG. 1 is a cross-sectional view in the tire width direction showing a truck / bus tire as an example of the tire of the present invention.
  • the illustrated tire 10 includes a tread portion 11 that forms a ground contact portion, a pair of sidewall portions 12 that extend inward in the tire radial direction continuously to both sides of the tread portion 11, and an inner periphery of each sidewall portion 12. And a bead portion 13 continuous on the side.
  • the tread portion 11, the sidewall portion 12, and the bead portion 13 are reinforced by a carcass 14 including a single carcass ply extending in a toroidal shape from one bead portion 13 to the other bead portion 13.
  • a bead core 15 is embedded in each of the pair of bead portions 13, and the carcass 14 is folded and locked around the bead core 15 from the inside to the outside of the tire. Further, a bead filler 16 is disposed outside the bead core 15 in the tire radial direction.
  • the tire of the present invention includes a spiral cord layer 1 having a structure in which a reinforcing cord is spirally wound on the outer side in the crown portion tire radial direction of the carcass 14 to form an upper layer 1A and a lower layer 1B.
  • a belt layer 17 is sequentially provided.
  • the at least 100% modulus of the rubber other than the coating rubber of the auxiliary belt layer 17 is characterized by being lower than the 100% modulus of the coating rubber of the auxiliary belt layer 17.
  • a low modulus rubber having a 100% modulus lower than the 100% modulus of the coating rubber of the auxiliary belt layer 17 can be used as the coating rubber of the helical cord layer 1.
  • an interlayer rubber is provided between the spiral cord layer 1 and the auxiliary belt layer 17, and the 100% modulus of this interlayer rubber is 20 to 95 of the 100% modulus of the coating rubber of the auxiliary belt layer 17. % Range is also preferable.
  • the 100% modulus of the interlayer rubber between the helical cord layer 1 and the auxiliary belt layer 17 can be 20 to 95%, preferably 25 to 80% of the 100% modulus of the coating rubber of the auxiliary belt layer. And When the modulus of the interlayer rubber exceeds 95%, the suppression of the distortion of the interlayer rubber becomes insufficient, and the effect of suppressing the occurrence of separation from the interlayer between the helical cord layer 1 and the auxiliary belt layer 17 cannot be sufficiently obtained. There is a fear. On the other hand, if the modulus of the interlayer rubber is less than 20%, cracks may occur in the interlayer rubber.
  • the 100% modulus of the interlayer rubber in the present invention refers to a tensile test at a speed of 500 ⁇ 25 mm / min at room temperature (25 ° C.) according to JIS K6251 using a JIS dumbbell-shaped No. 3 sample. It means the tensile stress at 100% elongation, as measured.
  • the interlayer rubber between the helical cord layer 1 and the auxiliary belt layer 17 is specifically a coating rubber of a reinforcing cord constituting the upper layer 1A of the helical cord layer 1, and an auxiliary belt layer.
  • the modulus-related condition is satisfied in the entire region where the spiral cord layer 1 and the auxiliary belt layer 17 are laminated. Thereby, since the strain between the layers can be reduced in the entire region where the spiral cord layer 1 and the auxiliary belt layer 17 are laminated, it is more effective in suppressing the occurrence of separation.
  • the tire of the present invention it is only important to satisfy the above-described modulus condition at least in the tire width direction end portion of the region where the spiral cord layer 1 and the auxiliary belt layer 17 are laminated.
  • the desired effect of the present invention can be obtained.
  • the spiral cord layer 1 includes a core material cord layer 2 between an upper layer 1A and a lower layer 1B, that is, a reinforcing cord is wound around the core material cord layer 2 in a spiral shape.
  • the core material cord layer 2 does not need to be provided.
  • the core material cord layer 2 may be provided as a single layer, or may be provided by laminating a plurality of layers, for example, 2 to 10 layers.
  • the core material cord layer 2 is manufactured by aligning a number of core material cords in parallel, disposing unvulcanized rubber above and below, and covering the core material cord with rubber.
  • the number of core material cords to be driven in the core material cord layer 2 is preferably in the range of, for example, 5 to 60 pieces / 50 mm.
  • the core material cord of the core material cord layer 2 may have an inclination angle of 40 to 90 ° with respect to the tire circumferential direction.
  • the inclination angle of the core material cord of the core material cord layer 2 is more preferably 50 to 90 ° with respect to the tire circumferential direction.
  • the plurality of core material cord layers 2 may constitute a crossing belt layer.
  • the spiral cord layer 1 is formed by spirally winding a rubber-cord composite in which one or a plurality of reinforcing cords, for example, 2 to 100, are arranged in parallel and covered with rubber. It is formed by turning it into a flat strip or by winding it around the core cord layer 2 in a spiral.
  • the number of reinforcing cords to be driven in the helical cord layer 1 is preferably in the range of, for example, 5 to 60 cords / 50 mm.
  • the angle of the reinforcing cord of the helical cord layer 1 is preferably in the range of 12 ° to 90 ° with respect to the tire circumferential direction. Since the upper layer 1A and the lower layer 1B are not separated at the end in the tire width direction, the spiral cord layer 1 has characteristics that it exerts tension when the tire is loaded with an internal pressure and is difficult to grow in diameter. However, when the angle of the reinforcing cord of the spiral cord layer 1 is set to 12 ° or more, the diameter growth at the time of internal pressure load can be within an allowable range, and the occurrence of wear at the shoulder portion can be prevented. Can be suppressed.
  • a value measured on the tire equator plane can be used as the angle of the reinforcing cord of the spiral cord layer 1. This angle is preferably in the range of 12 ° to 45 ° with respect to the tire circumferential direction.
  • the auxiliary belt layer 17 is formed by arranging a number of belt cords and covering them with rubber.
  • the angle of the belt cord of the auxiliary belt layer 17 is not particularly limited.
  • the belt cord of the auxiliary belt layer 17 and the reinforcing cord of the upper layer 1A of the adjacent spiral cord layer 1 may be inclined in the same direction with reference to the tire circumferential direction, and are inclined in the opposite direction. Also good.
  • the material of the reinforcing cord of the spiral cord layer 1 and the core cord of the core cord layer 2 is not particularly limited, and various conventional metal cords and organic fiber cords can be appropriately used.
  • the metal cord a steel filament or a steel cord obtained by twisting a plurality of steel filaments can be used.
  • various designs can be made for the twisted structure of the cord, and various cross-sectional structures, twisted pitches, twisted directions, and distances between adjacent filaments can be used.
  • various twist structures such as single twist, layer twist, and double twist can be adopted, and a cord having a flat cross-sectional shape can also be used.
  • the steel filament which comprises a steel cord has iron as a main component, and may contain various trace components, such as carbon, manganese, silicon, phosphorus, sulfur, copper, and chromium.
  • the surface of the steel filament may be subjected to brass plating in order to improve adhesion with rubber.
  • an aramid fiber aromatic polyamide fiber
  • PK polyketone
  • PBO polyparaphenylene benzobisoxazole
  • polyarylate fiber or the like
  • PAN polyacrylonitrile
  • carbon fiber pitch carbon fiber
  • carbon fiber such as rayon carbon fiber (carbon fiber), glass fiber (glass fiber), rock fiber such as basalt fiber and andesite fiber (rock wool), etc.
  • PAN polyacrylonitrile
  • These reinforcing cords are preferably treated with an adhesive to improve the adhesion to rubber.
  • This adhesive treatment can be performed according to a conventional method using a general-purpose adhesive such as an RFL adhesive.
  • a hybrid code composed of any two or more of the above may be used.
  • the rubber composition used for the coating rubber of the spiral cord layer 1 and the core cord layer 2 a known one can be used and is not particularly limited.
  • a rubber component of a rubber composition used for coating rubber in addition to natural rubber; vinyl aromatic hydrocarbon / conjugated diene copolymer, polyisoprene rubber, butadiene rubber, butyl rubber, halogenated butyl rubber, ethylene-propylene rubber All known rubber components such as synthetic rubber can be used.
  • a rubber component may be used individually by 1 type, or may use 2 or more types together.
  • the rubber component is composed of at least one of natural rubber and polyisoprene rubber, or contains 50% by mass or more of natural rubber and the balance is made of synthetic rubber. Is preferred.
  • the rubber composition used for the coating rubber includes fillers such as carbon black and silica, softeners such as aroma oil, methoxymethylated melamine such as hexamethylenetetramine, pentamethoxymethylmelamine and hexamethylenemethylmelamine.
  • the compounding agents normally used in the rubber industry such as methylene donors, vulcanization accelerators, vulcanization accelerators, anti-aging agents, and the like can be appropriately blended in ordinary compounding amounts.
  • the preparation method of the rubber composition used as the coating rubber in the present invention and according to a conventional method, for example, using a Banbury mixer or roll, the rubber component is sulfur, organic acid cobalt salt and various blends. What is necessary is just to knead an agent etc. and prepare.
  • the auxiliary belt layer 17 can be an inclined belt in which the belt cord forms a predetermined angle with respect to the tire circumferential direction.
  • a metal cord particularly a steel cord is most commonly used, but an organic fiber cord may be used.
  • the steel cord may be composed of steel filaments containing iron as a main component and containing various trace contents such as carbon, manganese, silicon, phosphorus, sulfur, copper, and chromium.
  • a steel monofilament cord may be used in addition to a cord obtained by twisting a plurality of filaments.
  • Various designs can be used for the twisted structure of the steel cord, and various cross-sectional structures, twisted pitches, twisted directions, and distances between adjacent steel cords can be used.
  • the cord which twisted the filament of a different material can also be employ
  • the width of the auxiliary belt layer 17 is preferably 40% to 115% of the tread width, and more preferably 50% to 70%.
  • a belt undercushion rubber 18 is preferably provided on the inner side in the tire radial direction of the end portion of the spiral cord layer 1. Thereby, the strain and temperature at the end of the spiral cord layer 1 can be reduced, and the tire durability can be improved.
  • the carcass 14 can adopt various configurations including a conventional structure, and may have either a radial structure or a bias structure.
  • the carcass 14 is preferably composed of one or two carcass plies made of a steel cord layer.
  • the maximum carcass width position in the tire radial direction may be close to the bead portion 13 side or may be close to the tread portion 11 side.
  • the maximum width position of the carcass 14 can be provided in the range of 50% to 90% relative to the tire height, on the outer side in the tire radial direction from the bead base portion.
  • the carcass 14 generally has a structure that extends between the pair of bead cores 15 without interruption, but is preferably formed by using a pair of carcass pieces that extend from the bead core 15 and are interrupted near the tread portion 11. You can also.
  • the folded end of the carcass 14 can be positioned on the inner side in the tire radial direction from the upper end of the bead filler 16, and the carcass folded end is extended to the outer side in the tire radial direction from the upper end of the bead filler 16 or the tire maximum width position.
  • the spiral cord layer 1 may extend from the tire width direction end to the inner side in the tire width direction.
  • the position of the folded end of the carcass 14 in the tire radial direction can be varied.
  • the number of driving carcass 14 is generally in the range of 5 to 60 pieces / 50 mm, but is not limited thereto.
  • a circumferential cord layer (not shown) may be provided on the outer side in the tire radial direction of the spiral cord layer 1 and the auxiliary belt layer 17.
  • the tire maximum width position can be provided in the range of 50% to 90% in comparison with the tire height on the outer side in the tire radial direction from the bead base portion.
  • the tire 10 is formed as a smooth curve that protrudes in the tire width direction without forming a recess contacting the rim flange.
  • the bead core 15 can adopt various structures such as a circular shape and a polygonal shape.
  • the bead portion 13 may have a structure in which the carcass 14 is sandwiched between a plurality of bead core members in addition to the structure in which the carcass 14 is wound around the bead core 15.
  • a bead filler 16 is disposed outside the bead core 15 in the tire radial direction.
  • the bead filler 16 is composed of a plurality of rubber members separated in the tire radial direction. Also good.
  • the tread pattern may be a rib-shaped land-based pattern, a block pattern, an asymmetric pattern, or a rotational direction designation.
  • the rib-like land portion main pattern is a pattern mainly composed of a rib-like land portion that is partitioned in the tire width direction by one or more circumferential grooves or circumferential grooves and tread ends.
  • the rib-like land portion refers to a land portion extending in the tire circumferential direction without having a transverse groove that traverses in the tire width direction, but the rib-like land portion has a transverse groove that terminates in the sipe or the rib-like land portion. May be. Since radial tires have a high contact pressure particularly when high internal pressure is used, it is considered that increasing the circumferential shear rigidity improves the contact performance on wet road surfaces.
  • a tread pattern consisting of only rib-shaped land portions in a region of 80% of the tread width centering on the equator plane, that is, a pattern having no lateral grooves. it can.
  • drainage performance in this region contributes particularly to wet performance.
  • the block pattern is a pattern having a block land portion divided by a circumferential groove and a width groove, and the tire of the block pattern is excellent in basic performance on ice and snow.
  • An asymmetric pattern is a pattern in which the left and right tread patterns are asymmetric with respect to the equator plane.
  • a negative rate difference may be provided between the tire half on the inner side of the vehicle mounting direction and the outer side of the vehicle mounting direction with respect to the equator plane.
  • the tire halves on the inner side in the mounting direction and on the outer side in the vehicle mounting direction may have different configurations in the number of circumferential grooves.
  • the tread rubber is not particularly limited, and conventionally used rubber can be used. Further, the tread rubber may be formed of a plurality of rubber layers different in the tire radial direction, and may have a so-called cap-base structure, for example. As the plurality of rubber layers, those having different tangent loss, modulus, hardness, glass transition temperature, material and the like can be used. Moreover, the ratio of the thickness of the plurality of rubber layers in the tire radial direction may be changed in the tire width direction, and only the circumferential groove bottom or the like may be a rubber layer different from the periphery thereof.
  • the tread rubber may be formed of a plurality of rubber layers different in the tire width direction, and may have a so-called divided tread structure.
  • the plurality of rubber layers those having different tangent loss, modulus, hardness, glass transition temperature, material and the like can be used.
  • the ratio of the length of the plurality of rubber layers in the tire width direction may be changed in the tire radial direction, and only in the vicinity of the circumferential groove, only in the vicinity of the tread, only in the shoulder land portion, only in the center land portion, etc. Only a limited part of the area may be a rubber layer different from the surrounding area.
  • the corner part 11a is formed in the end part of a tire tread part in the tire width direction.
  • the tire shown in FIG. 1 is a truck / bus tire, but the present invention is not limited to this, and can be suitably applied to tires for passenger cars, construction vehicles, two-wheeled vehicles, aircrafts, agriculture, and the like. it can. Further, the tire is not limited to a pneumatic tire, and can be applied to a solid tire or a non-pneumatic tire.
  • FIG. 2 is a cross-sectional view in the tire width direction showing one structural example of the tire for a passenger car of the present invention.
  • the illustrated tire 20 for a passenger car includes a tread portion 21 that forms a ground contact portion, a pair of sidewall portions 22 that extend continuously inward in the tire radial direction on both sides of the tread portion 21, and each sidewall portion 22. And a bead portion 23 continuous on the inner peripheral side.
  • the tread portion 21, the sidewall portion 22, and the bead portion 23 are reinforced by a carcass 24 including a single carcass ply that extends in a toroidal shape from one bead portion 23 to the other bead portion 23.
  • a bead core 25 is embedded in each of the pair of bead portions 23, and the carcass 24 is folded around the bead core 25 from the inside of the tire to the outside and locked. Further, a bead filler 26 is disposed outside the bead core 25 in the tire radial direction.
  • a spiral cord layer 1 having a structure in which a reinforcing cord is spirally wound to form an upper layer 1A and a lower layer 1B outside the crown portion tire radial direction of the carcass 24;
  • the auxiliary belt layer 27 is sequentially disposed.
  • the modulus of rubber between the spiral cord layer 1 and the auxiliary belt layer 27 is at least in the tire width direction end portion in the region where the spiral cord layer 1 and the auxiliary belt layer 27 are laminated. It is important to satisfy the above condition, and thereby the desired effect of the present invention can be obtained.
  • the auxiliary belt layer 27 is a cap layer 27 a disposed over the entire width of the spiral cord layer 1 or an area covering both ends of the spiral cord layer 1.
  • the layer layer 27b to be arranged is exemplified.
  • the cap layer 27a and the layer layer 27b are generally formed by winding a strip having a constant width formed by arranging a large number of cords and covering them with rubber in a spiral shape in the tire circumferential direction.
  • the cap layer 27a and the layer layer 27b may be provided alone or in combination. Alternatively, it may be a combination of two or more cap layers or two or more layer layers.
  • the modulus of the interlayer rubber between the spiral cord layer 1 and the auxiliary belt layer 27 disposed adjacent to the outer side in the tire radial direction becomes a problem.
  • the reinforcing cords for the cap layer 27a and the layer layer 27b.
  • Typical examples include rayon, nylon, polyethylene naphthalate (PEN), polyethylene terephthalate (PET), aramid, and glass fiber. , Carbon fiber, steel and the like. From the viewpoint of weight reduction, an organic fiber cord is particularly preferable.
  • the reinforcing cord may be a monofilament cord, a cord obtained by twisting a plurality of filaments, or a hybrid cord obtained by twisting filaments of different materials. Further, a wavy cord may be used for the reinforcing cord in order to increase the breaking strength. Similarly, in order to increase the breaking strength, for example, a high elongation cord having an elongation at break of 4.5 to 5.5% may be used.
  • the number of implantations of the cap layer 27a and the layer layer 27b is generally in the range of 20 to 60 pieces / 50 mm, but is not limited to this range.
  • the cap layer 27a can have a distribution of rigidity, material, number of layers, driving density, etc. in the tire width direction. For example, the number of layers can be increased only at the end in the tire width direction, while the center portion. Only the number of layers can be increased.
  • the cap layer 27a and the layer layer 27b are configured as spiral layers.
  • a plurality of core wires arranged in parallel with each other in a plane may be formed by a strip-like cord bundled with a wrapping wire while maintaining the parallel arrangement.
  • the carcass 24 can adopt various configurations including a conventional structure, and may be either a radial structure or a bias structure.
  • the carcass 24 is preferably composed of one or two carcass plies made of an organic fiber cord layer.
  • the maximum width position of the carcass 24 in the tire radial direction may be close to the bead portion 23 side or close to the tread portion 21 side, for example.
  • the maximum width position of the carcass 24 can be provided on the outer side in the tire radial direction from the bead base portion in a range of 50% to 90% relative to the tire height.
  • the carcass 24 generally has a structure that extends between the pair of bead cores 25 without interruption, but is preferably formed by using a pair of carcass ply pieces that extend from the bead core 25 and are interrupted in the vicinity of the tread portion 21. (Not shown).
  • the folded portion of the carcass 24 can employ various structures.
  • the folded end of the carcass 24 can be positioned on the inner side in the tire radial direction from the upper end of the bead filler 26, and the folded end of the carcass 24 can be positioned on the outer side in the tire radial direction from the upper end of the bead filler 26 or the tire maximum width position.
  • the spiral cord layer 1 can be extended to the inner side in the tire width direction than the end in the tire width direction.
  • the position of the folded end of the carcass 24 in the tire radial direction can be varied.
  • the carcass 24 is not folded back and is sandwiched between a plurality of bead core members may be employed, or a structure wound around the bead core 25 may be employed.
  • the number of driving of the carcass 24 is generally in the range of 5 to 60 pieces / 50 mm, but is not limited thereto.
  • the shape of the tread portion 21 is a point P on the tread surface in the tire equatorial plane CL in the tire width direction cross section in the case of a passenger car tire of narrow width and large diameter size.
  • the straight line parallel to the tire width direction is m1
  • the straight line passing through the ground contact E and parallel to the tire width direction is m2
  • the distance in the tire radial direction between the straight line m1 and the straight line m2 is the height LCR
  • the tire tread width When TW is TW, the ratio LCR / TW is preferably 0.045 or less.
  • the crown portion of the tire is flattened (flattened), the ground contact area increases, the input (pressure) from the road surface is relaxed, and the tire is deflected in the radial direction.
  • the rate can be reduced, and the durability and wear resistance of the tire can be improved.
  • it is preferable that a tread edge part is smooth.
  • the tread pattern may be a full lag pattern, a rib-shaped land-based pattern, a block pattern, an asymmetric pattern, or a rotational direction designation.
  • the full lug pattern may be a pattern having a width direction groove extending in the tire width direction from the vicinity of the equator plane to the contact edge, and in this case, the circumferential groove may not be included.
  • Such a pattern mainly composed of lateral grooves can effectively exhibit performance on snow.
  • the rib-like land portion main pattern is a pattern mainly composed of a rib-like land portion that is partitioned in the tire width direction by one or more circumferential grooves or circumferential grooves and tread ends.
  • the rib-like land portion refers to a land portion extending in the tire circumferential direction without having a transverse groove that traverses in the tire width direction, but the rib-like land portion has a transverse groove that terminates in the sipe or the rib-like land portion. May be. Since radial tires have a high contact pressure particularly when high internal pressure is used, it is considered that increasing the circumferential shear rigidity improves the contact performance on wet road surfaces.
  • a tread pattern consisting of only rib-shaped land portions in a region of 80% of the tread width centering on the equator plane, that is, a pattern having no lateral grooves. it can.
  • drainage performance in this region contributes particularly to wet performance.
  • the block pattern is a pattern having a block land portion divided by a circumferential groove and a width groove, and the tire of the block pattern is excellent in basic performance on ice and snow.
  • An asymmetric pattern is a pattern in which the left and right tread patterns are asymmetric with respect to the equator plane.
  • a negative rate difference may be provided between the tire half on the inner side of the vehicle mounting direction and the outer side of the vehicle mounting direction with respect to the equator plane.
  • the tire halves on the inner side in the mounting direction and on the outer side in the vehicle mounting direction may have different configurations in the number of circumferential grooves.
  • the tread rubber is not particularly limited, and conventionally used rubber can be used, and foamed rubber may be used. Further, the tread rubber may be formed of a plurality of rubber layers different in the tire radial direction, and may have a so-called cap-base structure, for example. As the plurality of rubber layers, those having different tangent loss, modulus, hardness, glass transition temperature, material and the like can be used. Moreover, the ratio of the thickness of the plurality of rubber layers in the tire radial direction may be changed in the tire width direction, and only the circumferential groove bottom or the like may be a rubber layer different from the periphery thereof.
  • the tread rubber may be formed of a plurality of rubber layers different in the tire width direction, and may have a so-called divided tread structure.
  • the plurality of rubber layers those having different tangent loss, modulus, hardness, glass transition temperature, material and the like can be used.
  • the ratio of the length of the plurality of rubber layers in the tire width direction may be changed in the tire radial direction, and only in the vicinity of the circumferential groove, only in the vicinity of the tread, only in the shoulder land portion, only in the center land portion, etc. Only a limited part of the area may be a rubber layer different from the surrounding area.
  • the tire maximum width position can be provided in the range of 50% to 90% in comparison with the tire height on the outer side in the tire radial direction from the bead base portion. Moreover, it is good also as a structure which has a rim guard. In the passenger car tire 20 of the present invention, it is preferable that a recess 23a that contacts the rim flange is formed.
  • the bead core 25 can adopt various structures such as a circular shape and a polygonal shape.
  • the bead portion 23 may have a structure in which the carcass 24 is sandwiched between a plurality of bead core members in addition to the structure in which the carcass 24 is wound around the bead core 25.
  • the bead filler 26 is disposed outside the bead core 25 in the tire radial direction.
  • the bead filler 26 may not be provided.
  • an inner liner may be usually disposed in the innermost layer of the tire.
  • the inner liner can be formed of a film layer mainly composed of a resin in addition to a rubber layer mainly composed of butyl rubber.
  • a porous member can be disposed on the tire inner surface or electrostatic flocking can be performed in order to reduce cavity resonance noise.
  • a sealant member for preventing air leakage at the time of puncture can be provided on the tire inner surface.
  • the use of the passenger car tire 20 is not particularly limited. It can be applied to tires for summer, all-season, and winter use. Further, it can also be used for a side-reinforced run-flat tire having a crescent-shaped reinforcing rubber layer on the sidewall portion 22 and a passenger vehicle tire having a special structure such as a stud tire.
  • FIG. 3 is a cross-sectional view in the tire width direction showing one structural example of the tire for construction vehicles of the present invention.
  • a tread portion 31 that forms a contact portion
  • a pair of sidewall portions 32 that extend inward in the tire radial direction continuously to both side portions of the tread portion 31, and each sidewall portion.
  • a bead portion 33 continuous to the inner peripheral side of 32.
  • the tread portion 31, the sidewall portion 32, and the bead portion 33 are reinforced by a carcass 34 including a single carcass ply that extends in a toroidal shape from one bead portion 33 to the other bead portion 33.
  • a bead core 35 is embedded in each of the pair of bead portions 33, and the carcass 34 is folded around the bead core 35 from the inside to the outside and locked. Further, a bead filler 36 is disposed outside the bead core 35 in the tire radial direction.
  • a helical cord layer 1 having a structure in which a reinforcing cord is spirally wound around the crown region of the carcass 34 to form an upper layer 1A and a lower layer 1B.
  • four belt layers 37a to 37d are sequentially arranged.
  • the four belt layers 37 correspond to the auxiliary belt layers in the present invention.
  • construction vehicle tires are composed of four or six belt layers, and in the case of six belt layers, the first belt layer and the second belt layer form the inner cross belt group, and the third belt.
  • the layer and the fourth belt layer form an intermediate crossing belt layer group, and the fifth belt layer and the sixth belt layer form an outer crossing belt layer group.
  • the inner cross belt layer group is replaced with the helical cord layer 1
  • the auxiliary belt layers 37a to 37d are arranged as the intermediate cross belt layer group and the outer cross belt layer group.
  • the first belt layer and the second belt layer are replaced with the helical cord layer 1
  • the third belt layer and the fourth belt layer are replaced with the auxiliary belt layer 37a, It may be 37b.
  • the width of the spiral cord layer 1 is 25% or more and 70% or less of the width of the tread surface
  • the widths of the auxiliary belt layers 37a and 37b are the width of the tread surface.
  • the width of the auxiliary belt layers 37c and 37d can be 60% or more and 110% or less of the width of the tread surface.
  • the inclination angle of the belt cords of the auxiliary belt layers 37a and 37b with respect to the carcass cord is 50 ° or more and 75 ° or less
  • the inclination angle of the belt cords of the auxiliary belt layers 37c and 37d with respect to the carcass cord is 70 °.
  • the angle may be 85 ° or less.
  • the modulus of rubber between the helical cord layer 1 and the auxiliary belt layer 37 is at least in the tire width direction end portion in the region where the helical cord layer 1 and the auxiliary belt layer 37 are laminated. It is important to satisfy the above condition, and thereby the desired effect of the present invention can be obtained.
  • no matter how many auxiliary belt layers 37 are disposed, the spiral cord layer 1 and the auxiliary belt layer 37 disposed adjacent to the outer side in the tire radial direction are provided.
  • the modulus of the rubber in between is a problem.
  • the auxiliary belt layer 37 is formed of a rubberized layer of a reinforcing cord, and can be an inclined belt having a predetermined angle with respect to the tire circumferential direction.
  • a reinforcing cord of the inclined belt layer for example, a metal cord, particularly a steel cord is most commonly used, but an organic fiber cord may be used.
  • the steel cord may be composed of steel filaments containing iron as a main component and containing various trace contents such as carbon, manganese, silicon, phosphorus, sulfur, copper, and chromium.
  • a steel monofilament cord may be used in addition to a cord obtained by twisting a plurality of filaments.
  • Various designs can be used for the twisted structure of the steel cord, and various cross-sectional structures, twisted pitches, twisted directions, and distances between adjacent steel cords can be used.
  • the cord which twisted the filament of a different material can also be employ
  • the inclination angle of the reinforcing cords of the other belt layers is preferably 10 ° or more with respect to the tire circumferential direction.
  • the width of the maximum width inclined belt layer having the largest width among the auxiliary belt layers 37 is preferably 90% to 115% of the tread width, and more preferably 100% to 105%.
  • a belt undercushion rubber 39 is preferably provided on the inner side in the tire radial direction at the end of the auxiliary belt layer 37. Thereby, the strain and temperature at the end of the auxiliary belt layer 37 can be reduced, and the tire durability can be improved.
  • the carcass 34 can adopt various configurations including a conventional structure, and may be either a radial structure or a bias structure.
  • the carcass 34 it is preferable that the carcass ply made of a steel cord layer has one or two layers.
  • the carcass maximum width position in the tire radial direction may be close to the bead portion 33 side or may be close to the tread portion 31 side.
  • the maximum width position of the carcass 34 can be provided on the outer side in the tire radial direction from the bead base portion in a range of 50% to 90% relative to the tire height.
  • the carcass 34 generally has a structure that extends between the pair of bead cores 35 without interruption.
  • the carcass 34 is formed by using a pair of carcass pieces that extend from the bead core 35 and are interrupted in the vicinity of the tread portion 31. You can also
  • the folded end of the carcass 34 can be positioned on the inner side in the tire radial direction from the upper end of the bead filler 36, and the folded end of the carcass 34 can be positioned on the outer side in the tire radial direction from the upper end of the bead filler 36 or the tire maximum width position.
  • the spiral cord layer 1 can be extended to the inner side in the tire width direction than the end in the tire width direction.
  • the position of the folded end of the carcass 34 in the tire radial direction can be varied.
  • carcass 34 is sandwiched between a plurality of bead core members without the folded portion, or a structure wound around the bead core 35 may be employed.
  • the number of carcass 34 to be driven is generally in the range of 5 to 60 pieces / 50 mm, but is not limited thereto.
  • the tire maximum width position can be provided in the range of 50% to 90% in comparison with the tire height on the outer side in the tire radial direction from the bead base portion.
  • the bead core 35 can adopt various structures such as a circular shape and a polygonal shape.
  • the bead portion 33 may have a structure in which the carcass 34 is sandwiched between a plurality of bead core members in addition to a structure in which the carcass 34 is wound around the bead core 35.
  • a bead filler 36 is disposed on the outer side in the tire radial direction of the bead core 35.
  • the bead filler 36 may be composed of a plurality of rubber members separated in the tire radial direction. Good.
  • the tread pattern may be a lag pattern, a block pattern, an asymmetric pattern, or a rotational direction designation.
  • the lug pattern may be a pattern having a width direction groove extending in the tire width direction from the vicinity of the equator plane to the contact edge, and in this case, the circumferential groove may not be included.
  • the block pattern is a pattern having a block land portion partitioned by a circumferential groove and a width groove. Particularly in the case of tires for construction vehicles, it is preferable to enlarge the block from the viewpoint of durability.
  • the width measured in the tire width direction of the block is preferably 25% to 50% of the tread width.
  • An asymmetric pattern is a pattern in which the left and right tread patterns are asymmetric with respect to the equator plane.
  • a negative rate difference may be provided between the tire half on the inner side of the vehicle mounting direction and the outer side of the vehicle mounting direction with respect to the equator plane.
  • the tire halves on the inner side in the mounting direction and on the outer side in the vehicle mounting direction may have different configurations in the number of circumferential grooves.
  • the tread rubber is not particularly limited, and conventionally used rubber can be used. Further, the tread rubber may be formed of a plurality of rubber layers different in the tire radial direction, and may have a so-called cap-base structure, for example. As the plurality of rubber layers, those having different tangent loss, modulus, hardness, glass transition temperature, material and the like can be used. Moreover, the ratio of the thickness of the plurality of rubber layers in the tire radial direction may be changed in the tire width direction, and only the circumferential groove bottom or the like may be a rubber layer different from the periphery thereof.
  • the tread rubber may be formed of a plurality of rubber layers different in the tire width direction, and may have a so-called divided tread structure.
  • the plurality of rubber layers those having different tangent loss, modulus, hardness, glass transition temperature, material and the like can be used.
  • the ratio of the length of the plurality of rubber layers in the tire width direction may be changed in the tire radial direction, and only in the vicinity of the circumferential groove, only in the vicinity of the tread, only in the shoulder land portion, only in the center land portion, etc. Only a limited part of the area may be a rubber layer different from the surrounding area.
  • the rubber gauge of the tread portion 31 is preferably thicker from the viewpoint of durability, and is preferably 1.5% to 4%, more preferably 2% to 3% of the tire outer diameter. Further, the ratio (negative rate) of the groove area to the ground contact surface of the tread portion 31 is preferably 20% or less. This is because the construction vehicle tire 30 is mainly used in a low-speed and dry area, so that it is not necessary to increase the negative rate because of drainage.
  • a tire size of a construction vehicle tire for example, a rim having a rim diameter of 20 inches or more, particularly a large rim having a rim diameter of 40 inches or more.
  • a reinforcing cord was spirally wound around one core cord layer, and a reinforcing member having a structure including a core cord layer between an upper layer and a lower layer of the spiral cord layer was produced.
  • This reinforcing member is disposed on the outer side in the tire radial direction of the crown portion of the carcass, and further, an auxiliary belt layer is disposed on the outer side in the tire radial direction, and the tire size 275 / 80R22.5 is used as shown in FIG. Bus tires were produced.
  • a steel cord having a 1 + 6 structure using a steel filament having a wire diameter of 1.13 mm was used as the core material cord of the core material cord layer and the belt cord of the auxiliary belt layer.
  • the inclination angle of the steel cord of the core cord layer was set to 70 ° with respect to the longitudinal direction of the reinforcing member.
  • the inclination angle of the reinforcing cord of the spiral cord layer and the steel cord of the auxiliary belt layer was 16 ° with respect to the longitudinal direction of the reinforcing member.
  • the inclination direction of the steel cord of the auxiliary belt layer was the same as the reinforcement cord of the upper layer of the adjacent spiral cord layer, and the inclination direction of the steel cord of the core cord layer was the reverse direction.
  • the number of core cord layers to be driven was 18.06 / 50 mm, and the number of auxiliary belt layers to be driven was 24.21 / 50 mm.
  • Table 1 shows the results when a PAN-based carbon fiber cord (cord structure: 12000 dtex / 1) is used as the reinforcing cord of the spiral cord layer.
  • the number of driven spiral cord layers was 27.65 / 50 mm.
  • the traveling distance of each of the examples and comparative examples, where the traveling distance when the 100% modulus of the interlayer rubber between the spiral cord layer and the auxiliary belt layer is equal to the 100% modulus of the coating rubber of the auxiliary belt layer is 100.
  • the ratio is shown in Table 1 below. It shows that durability of a belt part is improving, so that the ratio of travel distance is large.
  • Table 2 shows the results when an aramid cord (cord structure: 3340 dtex // 2/3) is used as the reinforcing cord of the spiral cord layer.
  • the number of driven spiral cord layers was 25/50 mm.
  • the traveling distance of each of the examples and comparative examples, where the traveling distance when the 100% modulus of the interlayer rubber between the spiral cord layer and the auxiliary belt layer is equal to the 100% modulus of the coating rubber of the auxiliary belt layer is 100.
  • the ratio is shown in Table 2 below. It shows that durability of a belt part is improving, so that the ratio of travel distance is large.
  • Spiral cord layer 1A Upper layer 1B Lower layer 2 Core material cord layer 10 Truck / bus tires 11, 21, 31 Tread portion 11a Corner portions 12, 22, 32 Side wall portions 13, 23, 33 Bead portions 14, 24, 34 Carcass 15, 25, 35 Bead cores 16, 26, 36 Bead fillers 17, 27, 37 a to 37 d
  • Layer layer 20 Passenger car tire 23 a Recess 18, 39 Belt under cushion rubber 30 Construction vehicle tire 101, 102 Reinforcement cord

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)

Abstract

Technologie pour un pneumatique comprenant une couche de fils câblés hélicoïdaux et une couche de ceinture de support, ladite technologie étant destinée à supprimer l'apparition d'une séparation vis-à-vis d'une couche intermédiaire entre la couche de fils câblés hélicoïdaux et la couche de ceinture de support. Un pneumatique comprend : une carcasse 14 qui s'étend selon une forme toroïdale entre une paire de sections talons 13 ; une couche de fils câblés hélicoïdaux 1 qui est positionnée à l'extérieur, dans une direction de rayon de pneumatique, d'une section sommet de la carcasse 14, et dans laquelle un fil câblé de renforcement est enroulé de manière hélicoïdale et une couche supérieure 1A et une couche inférieure 1B sont formées ; et une couche de ceinture de support 17 qui est positionnée à l'extérieur, dans la direction de rayon de pneumatique, de la couche de fils câblés hélicoïdaux. Au moins au niveau de sections d'extrémité, dans le sens de la largeur de pneumatique, d'une région où la couche de fils câblés hélicoïdaux et la couche de ceinture de support sont stratifiées, parmi le caoutchouc qui est interposé entre la couche de fils câblés hélicoïdaux et la couche de ceinture de support, le module à 100 % d'au moins un caoutchouc autre qu'un caoutchouc de revêtement de la couche de ceinture de support est inférieur au module à 100 % du caoutchouc de revêtement de la couche de ceinture de support.
PCT/JP2017/041607 2016-11-25 2017-11-20 Pneumatique WO2018097084A1 (fr)

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US16/464,159 US20200317000A1 (en) 2016-11-25 2017-11-20 Tire
EP17873668.2A EP3546246B1 (fr) 2016-11-25 2017-11-20 Pneumatique

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WO2019244771A1 (fr) * 2018-06-18 2019-12-26 株式会社ブリヂストン Bandage pneumatique
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Citations (5)

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Publication number Priority date Publication date Assignee Title
JPH09240213A (ja) * 1996-03-11 1997-09-16 Yokohama Rubber Co Ltd:The 空気入りラジアルタイヤ
JPH11321222A (ja) * 1998-05-18 1999-11-24 Yokohama Rubber Co Ltd:The 空気入りラジアルタイヤ
JP2004001609A (ja) 2002-05-31 2004-01-08 Yokohama Rubber Co Ltd:The 空気入りラジアルタイヤ
JP2012171421A (ja) * 2011-02-18 2012-09-10 Bridgestone Corp 空気入りタイヤ
JP2015006857A (ja) * 2013-06-25 2015-01-15 株式会社ブリヂストン 重荷重用空気入りタイヤ

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11321233A (ja) * 1998-05-18 1999-11-24 Yokohama Rubber Co Ltd:The 空気入りラジアルタイヤ
JP4656961B2 (ja) * 2005-02-07 2011-03-23 株式会社ブリヂストン 空気入りタイヤ
JP6501113B2 (ja) * 2015-05-13 2019-04-17 株式会社ブリヂストン 空気入りタイヤ

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09240213A (ja) * 1996-03-11 1997-09-16 Yokohama Rubber Co Ltd:The 空気入りラジアルタイヤ
JPH11321222A (ja) * 1998-05-18 1999-11-24 Yokohama Rubber Co Ltd:The 空気入りラジアルタイヤ
JP2004001609A (ja) 2002-05-31 2004-01-08 Yokohama Rubber Co Ltd:The 空気入りラジアルタイヤ
JP2012171421A (ja) * 2011-02-18 2012-09-10 Bridgestone Corp 空気入りタイヤ
JP2015006857A (ja) * 2013-06-25 2015-01-15 株式会社ブリヂストン 重荷重用空気入りタイヤ

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EP3546246A1 (fr) 2019-10-02
CN109982866B (zh) 2021-10-26
CN109982866A (zh) 2019-07-05

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